dynamic to kinematic viscosity calculator

Viscosities of products and chemical species at varying conditions.Ībsolute or Dynamic Viscosity Online ConverterĬonvert between dynamic or absolute viscosity units - Poiseuille, Poise, centPoise and more. Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more. Material properties of gases, fluids and solids - densities, specific heats, viscosities and more. Involving velocity, pressure, density and temperature as functions of space and time. Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more. U 100☏ = Saybolt Second Universal (SSU) viscosity at 100☏ in Saybolt Universal seconds equivalent to kinematic viscosity in centiStokes at temperature t (☏)ĭownload and print Kinematic Viscosity Unit Converting Chart U t = Saybolt Second Universal (SSU) viscosity at temperature t (☏) Saybolt Second Universal (SSU) Viscosity at temperatures other than 100 or 210 oFĪt temperatures other than 100 or 210☏, convert kinematic viscosity to Saybolt Universal viscosity with Note! Viscosity conversions are based on fluids with specific gravity of one. Check ASTM D 2161 'Standard Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity'Ģ) Water at 68.4 oF (20.2 oC) has an absolute viscosity of one - 1 - centiPoise. It appears Stokes and Poise got the same answer just in two different ways.1) The Saybolt Universal SUS viscosity equivalent (SSU or SUS) to a given kinematic viscosity varies with the temperature at which the determination is made. If you divide kinematic viscosity by the fluid density, you get absolute viscosity. Thus, dynamic viscosity is a measure of force, while kinematic viscosity is a measure of velocity. Kinematic viscosity incorporates fluid density as part of its measurement. This means the fluid’s weight or density helps it to flow. There is no external force pushing the fluid. It is the time it takes to have a known amount of fluid flow a given distance. The formula for kinematic viscosity is 1 centistoke (cSt) equals 1 millimeter squared per second (mm 2/s). This viscosity measurement was given the term kinematic. Again, centistokes (cSt) is used for easier readings. These tests led to Stokes’ law and a different form of viscosity measurement. He tested this theory by putting fluid in a glass tube and measuring how long it took for the fluid to flow a certain distance. Stokes surmised there was some type of internal friction in the fluid causing the different rates of falling. He discovered that the same particle sank at different rates in different fluids. Therefore, this type of viscosity measurement requires an external force in order to be measured.Ībout the same time Poise was performing his tests, an Irishman named Sir George Stokes was dropping particles into fluids and measuring how fast they fell to the bottom. Pascal is a unit of force just like horsepower. The formula for dynamic or absolute viscosity is 1 centipoise (cP) equals 1 millipascal-second (mPa-s). The term dynamic or absolute is used for this viscosity measurement. To make readings easier, centipoise (cP) is preferred for lubricant viscosities. This internal friction is measured by the force needed to make it flow and was given the measurement name of poise. This led him to conclude that different fluids have an internal friction which must be overcome by an external force in order to flow. Poiseuille found that different blood flowed at different speeds through the glass tubes with the same amount of force. This article explains the differences.Īround 1840, a French mathematician named Jean Leonard Marie Poiseuille conducted tests involving the flow of blood through small glass tubes. This resistance is measured by two different methods.

The definition of lubricant viscosity is the fluid’s resistance to flow and shear. Viscosity is the utmost characteristic of a lubricant.

Dynamic to kinematic viscosity calculator